Improved safety-switch lock



N. PETERS, FHOTCLLITKOGRAFNER. WASHINGTON D C imita. ser

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@anni HARRY C. COTTER ANDA GEORGE G. GREENE, OF FORT WAYNE, INDIANA.

Letters Patent No. 83,834, 'dated November 10, 1868.

IMPROVED SAFETY-SWITCH LQCK.

The Schedule referred to in theae Letters Patent and making pari; of the same.

To all 'whom it may concern.:

Beitlmown that we, HARRY C. Go'r'r'nu and Gnonen G. GREENE, of Fort Wayne, in the county of Allen, and

State of Indiana, have invented certain new and usefuly Improvements in Safety-Switch Locks; and we do hereby declare that the following is a full and exact description thereof, reference being had to the accompanying drawings, and to the letters of reference marked thereon, in which like letters refer to like parts in the ditlerent figures.

To enable others skilled in the arts to make and use our invention, we will proceed to describe its construetion and operation.

In the drawings- Figure l is a vertical section.

Figure 2 is a plan view. v

The nature oi' our invention consists in an improvement in method of constructing switch-locks.

A represents a horizontal bar, upon the outer edge of which are mounted stops or catches, (t a a" uf". Said catches work through guard B, as seen in the drawings, iig. 2. Said har A, in its operation, moves laterally, and is actuated by means oi' spiral springs b b, which serve to force stop ct forward to the position seen in fig. 2.

G represents one or more eccentric-levers, which are pivoted at c c, and are connected and pivoted together by bar D, as seen at e e in iig. 2.

E represents a vertical axle, whose centre is positioned on a line with and equidistant from pivots c c. l

f represents au arm, which extends horizontally and at right angles to axle E, and is pivoted to bar D at a point in line with and equidistant'from pivot c (See 2.) Y

gg represents a handle, which extends horizontally backward at right angles to axle E, and is used in operating the apparatus, as will be described.

Eccentric-levers, C, are each provided with an eccentric-recess, h h, constructed in the form seen in the drawings, iig. 2, through which a stud or pin, i, passes.

The outer edgeof said recesses is so formed that when the handle or lever 1] is carried around so as to stand at right angles to the bai D, then the eccentriclevers C C are also brought to the same angle, and the surface, j, in said recess, bears directly on stud yi, and the said studs, together with stop-bar A, are drawn backward in a parallel line, and thus the lever F is relieved, and may be forced in either direction.

. K represents arms, which are formed on and extend forward from the eccentric-levers, through the guard B,

and into slot G, in which the lever F moves. Now, iti is clear that when the stops a are withdrawn from slot G, so as to relieve the lever F, the arms K- extend across the said slot, and will intercept the movement of said lever F. But said eccentrics and arms are so constructed and held imposition that a slight pressure ofthe lever throws them oi their centres, and thev spring-pressure ot' stop-bar A impels it forward in such amanner as to carry the outer end of the level K to the position seen in* the drawing, g. 2, and thus the catches are forced out, and across the slot G, to the position seen in iig. 2. At the same time the lever F must be continued in its forward movement until it strikes the inclined sin-face of stop a, which yields easily to lthe pressure, and is thereby thrown back far 'enough to 1ct the lever pass when it comes forward, thus eiectually securing it in the desired position.

H represent-s a stop-bar, which is positioned as seen in iig. 2, and is provided with a recess, m m, through which rods, yny n, may pass frcelywhen in range. This bar receives a reciprocating motion, and is so operated, by a key or any other mechanical deiice, that when the key is removed om the apparatus, the stop-bar is so positioned that the apertures fm m are thrown out lof range with the rods nI n, and they consequently cannot be forced backward, the result of which is, that the stopbar and catches a are securely locked in position. Recesses lmy 'm cannot be brought in range with rods n n except by the use of the key. Said switch cannot be adjusted unless a key is used, and the key cannot be removed or the switch locked unless the switch-lever is in the desired position.

The advantages of this switch-lock are, its entire safety, durability, and effective operation, it being impossible to remove the key from the lock until the lever is adjusted to the desired point, and when once locked, it is perfectly secure.

What we claim as new, and desire to secure by Letters Patent, is-

Stop-bar A, carrying stops a a a a', and eccentriclevers C C, in combination with the stop-bar H, having recesses 'm mf, the whole being constructed in the manner and for the purpose substantially as-set hrth and described.

H. G. CUTTER. G. G. GREENE. XVitnesses:

H. E. WrLLsoN, ALLEN ZoLLkRs. 

